Originally Posted by
cobba
It would probably work, SRAM doesn't have front and rear specific adapters, they have a 20mm IS adapter that's for front 180mm and rear 160mm
Does the following image shows how the pads are contacting the rotor?
If it does, it would be an indication that something isn't right with your setup

I went to my LBS and got the proper front adapter. It now sits better, but the pads do hang down past the rotor , similar to that image.